The WSDD-00009 is a dual duplexer designed to suppress interference used by close proximity commercial SMR mobile services. The WSDD-00009 requires no radio modification other than inserting the product into the antenna cable path from the radio to the antenna. The WSDD-00009 provides a transmit passband of 811.075 MHz to 816.10 MHz with extremely low passband loss of 0.4 dB maximum for through path Tx signals. The receive passband is 856.075 MHz to 861.1 MHz with maximum passband insertion loss of 1.6 dB and high selectivity of 17 dB minimum at ۫ MHz from receive passband edges. Passband return loss is specified at 14 dB minimum. Transmit passband power handling is 50 watts CW and 250 watts peak instantaneous. Operating temperature range is 㪢°C to +60°C. Dimensions are 14.4 inchesD × 8.75 inchesW × 3.25 inchesH.